NZ749501B2 - Fibc liner film - Google Patents
Fibc liner filmInfo
- Publication number
- NZ749501B2 NZ749501B2 NZ749501A NZ74950118A NZ749501B2 NZ 749501 B2 NZ749501 B2 NZ 749501B2 NZ 749501 A NZ749501 A NZ 749501A NZ 74950118 A NZ74950118 A NZ 74950118A NZ 749501 B2 NZ749501 B2 NZ 749501B2
- Authority
- NZ
- New Zealand
- Prior art keywords
- film
- copolymer
- layer
- copolymers
- plastic film
- Prior art date
Links
- 229920001577 copolymer Polymers 0.000 claims abstract description 28
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 22
- 229920000570 polyether Polymers 0.000 claims abstract description 22
- 229920000098 polyolefin Polymers 0.000 claims abstract description 20
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 18
- 239000001301 oxygen Substances 0.000 claims abstract description 18
- 230000004888 barrier function Effects 0.000 claims abstract description 16
- 239000002985 plastic film Substances 0.000 claims abstract description 13
- 229920006255 plastic film Polymers 0.000 claims abstract description 13
- 229920001519 homopolymer Polymers 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 20
- -1 polyethylene Polymers 0.000 claims description 15
- 239000004952 Polyamide Substances 0.000 claims description 14
- 229920002647 polyamide Polymers 0.000 claims description 14
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 claims description 12
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 claims description 12
- 239000004715 ethylene vinyl alcohol Substances 0.000 claims description 12
- 229920006213 ethylene-alphaolefin copolymer Polymers 0.000 claims description 11
- 239000005977 Ethylene Substances 0.000 claims description 9
- 239000004698 Polyethylene Substances 0.000 claims description 8
- 229920000573 polyethylene Polymers 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 6
- 229920000728 polyester Polymers 0.000 claims description 6
- 229920001400 block copolymer Polymers 0.000 claims description 3
- 229920002554 vinyl polymer Polymers 0.000 claims 1
- 229920000642 polymer Polymers 0.000 abstract description 19
- 238000002844 melting Methods 0.000 abstract description 14
- 230000008018 melting Effects 0.000 abstract description 14
- 239000010410 layer Substances 0.000 description 57
- 238000007789 sealing Methods 0.000 description 12
- 229920001684 low density polyethylene Polymers 0.000 description 11
- 239000004702 low-density polyethylene Substances 0.000 description 11
- 229940099514 low-density polyethylene Drugs 0.000 description 11
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical group C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 8
- 230000000977 initiatory effect Effects 0.000 description 8
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 5
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 5
- 239000005038 ethylene vinyl acetate Substances 0.000 description 5
- 235000013305 food Nutrition 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 5
- 239000005033 polyvinylidene chloride Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 229920000092 linear low density polyethylene Polymers 0.000 description 4
- 239000004707 linear low-density polyethylene Substances 0.000 description 4
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920002292 Nylon 6 Polymers 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 3
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000000113 differential scanning calorimetry Methods 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 229920001903 high density polyethylene Polymers 0.000 description 3
- 229920000554 ionomer Polymers 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000004711 α-olefin Substances 0.000 description 3
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 239000004594 Masterbatch (MB) Substances 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N Propene Chemical compound CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- QYMGIIIPAFAFRX-UHFFFAOYSA-N butyl prop-2-enoate;ethene Chemical compound C=C.CCCCOC(=O)C=C QYMGIIIPAFAFRX-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- 229920006245 ethylene-butyl acrylate Polymers 0.000 description 2
- 229920006225 ethylene-methyl acrylate Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229920001179 medium density polyethylene Polymers 0.000 description 2
- 239000004701 medium-density polyethylene Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000012968 metallocene catalyst Substances 0.000 description 2
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 239000011112 polyethylene naphthalate Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 229920002215 polytrimethylene terephthalate Polymers 0.000 description 2
- 229920001862 ultra low molecular weight polyethylene Polymers 0.000 description 2
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 229920000572 Nylon 6/12 Polymers 0.000 description 1
- 229920000034 Plastomer Polymers 0.000 description 1
- 229920002614 Polyether block amide Polymers 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 235000009470 Theobroma cacao Nutrition 0.000 description 1
- 239000004708 Very-low-density polyethylene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 125000005250 alkyl acrylate group Chemical group 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 229920006125 amorphous polymer Polymers 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 description 1
- 244000240602 cacao Species 0.000 description 1
- 235000016213 coffee Nutrition 0.000 description 1
- 235000013353 coffee beverage Nutrition 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- HGVPOWOAHALJHA-UHFFFAOYSA-N ethene;methyl prop-2-enoate Chemical compound C=C.COC(=O)C=C HGVPOWOAHALJHA-UHFFFAOYSA-N 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Chemical compound CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 description 1
- 239000005043 ethylene-methyl acrylate Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004941 influx Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 235000014571 nuts Nutrition 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 229920006149 polyester-amide block copolymer Polymers 0.000 description 1
- 229920005644 polyethylene terephthalate glycol copolymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 1
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 229920001866 very low density polyethylene Polymers 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/02—2 layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/05—5 or more layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—Non-permeable
- B32B2307/7244—Oxygen barrier
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/738—Thermoformability
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2329/00—Polyvinylalcohols, polyvinylethers, polyvinylaldehydes, polyvinylketones or polyvinylketals
- B32B2329/04—Polyvinylalcohol
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
- B32B2439/40—Closed containers
- B32B2439/46—Bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
- B32B2439/70—Food packaging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
- B32B27/285—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyethers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/16—Large containers flexible
- B65D88/1612—Flexible intermediate bulk containers [FIBC]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1334—Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1334—Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.]
- Y10T428/1341—Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit
Abstract
The invention relates to plastic film preferably with a thickness of 50 to 300 microns, comprising a polyolefin homopolymer or copolymer, a polyether copolymer having a melting point between 100°C and 120°C and a layer comprising oxygen barrier polymer.
Description
FIBC LINER FILM
This ation claims priority from European Application No. 17210227.9 filed on 22
er 2017, the contents of which are to be taken as incorporated herein by this
reference.
The invention relates to plastic film ably with a thickness of 50 to 300 microns,
comprising a polyolefin homopolymer or copolymer, a her copolymer having a melting
point between 100°C and 120°C and a layer comprising oxygen barrier polymer.
BACKGROUND
Plastic ners have been increasingly used in packaging applications, such as “food
packaging”. A typical plastic container often used for bulk packaging of food (e.g. powdery
food, coffee, cocoa, nuts) is called FIBC (= le intermediate bulk container). This type of
container often is a woven polyethylene or polypropylene.
In the inside or outside of the woven material, r plastic liner is often used. This liner is
a monolayer or a multilayer and comprises polymer materials. There are different types of
adherence of this liner to the outer woven liner as shown e.g. in US 6,374,579.
In the case of a multilayer, the different layers offer ent advantages to the final
applications. The inside layer (= the layer coming into direct contact with the food packed) is
often formulated to allow very good sealing, thus protecting from the existence of leakers that
would be detrimental for the packed product. Other layers may comprise abuse resistant
polymers to increase the mechanical strength of the material.
In case of oxygen sensitive food materials, at least one layer of the ayer construction
comprises material which is impermeable to oxygen. As it is well known in the art, such
materials are e.g. polyamides, PVDC or EVOH.
Often the multilayer film is in “gusseted tube“ configuration. The reason is that this
uration is more practical for bulk filling, transport and unloading versus a simple tube.
Gussets are produced in line with the process by the use of two “pleating constructions”
(often wooden or metal boards) which the film follows. As these multilayer tube materials are
often produced with the “hot blown film” method which involves rotation of the collapsing
frame-nip roll section, a common problem is that s are present continuously or
periodically ing the rotation and this increases the scrap and lowers the efficiency of the
operation. There are cases where the creases are so often that the tubular film cannot be
processed into a gusseted tube.
It is generally known in the art that less stiff polymers e.g. LDPE have better gussetability
versus stiffer ones like HDPE. It is believed that the material must be softer and more pliable
in order to form efficiently a gusset during the production s. r materials with high
oxygen barrier properties such as EVOH or polyamide make the gusseting process even
more difficult as they are usually stiffer than polyolefins.
Patent application EP 3 216 599 A1 teaches a way to improve gussetability by using a
polyether mer (with ide or polyolefins) in blend with polyolefins in at least one
layer of the film. This ion has the drawback that sealing temperatures start from 140°C
to 160°C i.e. in conditions higher than pure polyolefins such as polyethylene. There is a need
to move the sealing temperature “window” to lower temperatures e.g. down to 120°C in order
to produce liners at same or similar conditions with normal polyethylene non-barrier liners.
There is further a need to improve the gussetability of the plastic structure ie to find materials
pliable enough and with enough bubble stability to produce gussets with no creases in the
commonly used thickness range of 50-300 microns without sacrificing the oxygen barrier
ties of the plastic film. There is also a need to combine this improvement in
gussetability with the above requirements in sealing at low temperatures.
SUMMARY OF THE INVENTION
It has been unexpectedly found that the addition of polyether copolymers with melting point
of 100°C to 120°C in blends with polyolefins e very much the gussetability of oxygen
barrier c films and at the same time lower the seal tion temperature of the film to
120°C.
According to the invention a very suitable film for the FIBC liner has preferably an average
thickness of 50 to 300, more ably an average thickness of 60 to 150, most preferably
an average thickness of 60 to 130 microns and comprises
*a polyolefin homopolymer or copolymer
*a her copolymer having a melting point in the range of 100°C to 120°C,
* an oxygen r material such as EVOH, polyamide or PVDC
Further preferred embodiments of the invention will be explained in the detailed description
of the invention.
DEFINITIONS
In this application the following tions are used:
The term “gusset” is interpreted as well known in the art. That is a plastic tubular film having
a partial 4-fold configuration.
The term “film” refers to a flat or tubular flexible structure of thermoplastic material.
The term “heat shrinkable” refers to a film that shrinks at least 10% in at least one of the
longitudinal and transverse directions when heated at 90°C for 4 seconds. The shrinkability is
measured according to ASTM 2732.
The phrase “longitudinal direction” or “machine direction” herein abbreviated “MD” refers to a
direction along the length of the film.
The phrase “outer layer” refers to the film layer which comes in immediate contact with the
outside environment (atmosphere).
The phrase “inner layer” refers to the film layer that comes in direct contact with the product
packed. This is also called “sealing layer” as this layer must be hermetically sealed in order
to protect the t from ingress of air.
The phrase “intermediate layer” refers to any layer of the film that is neither outer nor inner
layer. A film may comprise more than one intermediate layers.
As used herein, the term olymer” refers to a r resulting from polymerization of
a single monomer.
As used herein, the term “copolymer” refers to a polymer resulting from polymerization of at
least two different polymers.
As used herein, the term “polymer” includes both above types.
As used herein, the term “polyolefin” includes all the polymers produced by rization of
olefins. Polyethylene, polypropylene, tylene and other products are included in this
general category.
As used herein the term “polyethylene” identifies polymers consisting essentially of the
ethylene repeating unit. The ones that have a density more than 0.940 are called high
density polyethylene , the ones that are have less than 0.940 are low density
polyethylene (LDPE).
As used herein the phrase “ethylene alpha olefin copolymer” refers to polymers like linear
low-density polyethylene ), medium density polyethylene (MDPE), very low density
polyethylene ), ultra-low density polyethylene (ULDPE), metallocene catalysed
polymers and polyethylene plastomers and elastomers.
In these cases, the alpha olefin can be propene, butene, , octene etc as known in the
As used herein the term “homogeneous ethylene alpha olefin copolymers” refer to ethylene
alpha olefin copolymers having a molecular weight distribution MWD (Mw/Mn) of less than 2.7
as measured by GPC. Typical examples of these polymers are AFFINITY from DOW or
Exact from Exxon.
As used herein the phrase ne polymers” refers to styrene homopolymer such as
polystyrene and to styrene copolymers such as styrene-butadiene copolymers, styrenebutadiene-styrene
copolymers, styrene-isoprene-styrene copolymers, styrene-ethylenebutadiene-styrene
copolymers, ethylene-styrene copolymers and the like.
As used herein the phrase ”ethylene methacrylate mers” refers to copolymers of
ethylene and rylate monomer. The monomer t is less than 40% by weight.
Abbreviation used is EMA.
As used herein the phrase “ethylene vinyl acetate copolymer” refers to copolymers of
ethylene and vinyl acetate. Abbreviation used is EVA.
As used herein the term “oxygen barrier polymer” refers to polymers that do not allow the
ingress of oxygen in packs. Typical materials are polyamide, EVOH or PVDC.
As used herein, the term EVOH refers to saponified products of ethylene vinyl ester
copolymers. The ethylene content is typically in the range of 25 to 50% per mol.
As used herein the term PVDC refers to a vinylidene chloride copolymer n a major
amount of the copolymer comprises vinylidene chloride and a minor amount of the copolymer
comprises one or more monomers such as vinyl chloride and/or alkyl acrylates and
rylates.
As used herein the term polyamide refers to homopolymers and mers that include
amide linkages as well known in the art.
As used herein the term “ionomer” refers to ethylene-acid copolymers which have been
neutralized by metals such as sodium, zinc, lithium or others.
The acid used is usually methacrylic or acrylic acid.
As used herein, the term “ethylene acid copolymer“ refers to copolymers of ethylene with
acid, most usually methacrylic or acrylic acid.
As used herein, the term “polyester” includes crystalline polymers, amorphous polymers and
polyester elastomers. Common polyesters are crystalline PET (polyethylene terephthalate),
amorphous PET, PETG (glycol modified hylene thalate), PBT (polybutylene
terephthalate), PTT (polytrimethylene terephthalate), PBN (polybutylene naphthalate), PEN
(polyethylene naphthalate), polyester-ether block copolymers and polyester-ester block
copolymers of hard and soft blocks.
Other polyester materials are also included in the above definition.
As used herein the term “polybutylene” refers to butene-1 homopolymers and mers.
Useful copolymers comprise ne mer units. ne content should be generally less
than 50% by weight.
All measurement methods mentioned herein are readily available for the skilled person. For
example, they can be obtained from the American National Standards Institute at:
bstore.ansi.org
All percentages used are per weight unless stated otherwise.
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a film comprising
*a polyolefin lymer or mer
*a polyether copolymer having melting point in the range of 100°C to 120°C
*an oxygen barrier material.
In a preferred ment, the film is in the form of gusseted tube.
In a further preferred ment, the average thickness of the film is in the range 50-300
microns, preferably 60-150 s, more preferably 60-130 microns.
In a further preferred embodiment, the polyolefin homopolymer or copolymer is an ethylene
alpha olefin copolymer. In a further preferred embodiment, the alpha olefin is butene, hexene
or octene. In a further preferred embodiment, the ethylene alpha olefin copolymers are
produced with metallocene catalysts.
FILM CONSTRUCTION
Preferably the film comprises 5 to 15 layers, more preferably 7 to 12 layers.
A typical example of the film uction in 7-layer mode is
Outer layer/intermediate layer/tie barrier layer/tie layer/intermediate layer/inner layer
The film is preferably produced by the hot blown film method and is not heat shrinkable.
Barrier layer(s)
The film in a preferable embodiment contains high oxygen barrier materials so that it protects
the components of the pack from the ental effect of oxygen ingress. EVOH is a
preferred option but also polyamide and PVDC are viable alternatives. The EVOH comprises
preferably 24% to 50% ethylene per mol, more preferably 27% to 48%.
In another preferred embodiment of the invention, the barrier polymer is polyamide. Most
suitable ides are polyamide 6 and copolymer 6/66 or 6/12.
ediate layer(s)
Preferably, the intermediate layers comprise different polyolefins. Preferred polyolefins are
ethylene alpha olefin copolymers, where alpha olefin is preferably butene, hexene or .
In a red embodiment the ethylene alpha olefin copolymers are random copolymers with
densities from 0.870 g/cm3 up to 0.960 g/cm3. In a further preferred embodiment, the
molecular weight distribution MWD (Mw/Mn) as measured by GPC of the ethylene alpha olefin
copolymers is less than 10, preferably less than 5, preferably less than 3.
Tie layer(s)
As well known in the art, there is no l on between polyolefins and oxygen barrier
polymers such as EVOH.
Suitable materials for the tie layer process include maleic anhydride modified EVA, maleic
anhydride modified polyethylene, maleic anhydride modified EMA, maleic anhydride modified
elastomer, partially saponified EVA mer and polyurethane elastomer.
In the tie layers also polyamides can be used, given the strong natural adhesion n
polyamide and EVOH. Preferred polyamides are polyamide 6, polyamide 6/66 and polyamide
6/12.
Outer layer
The outer layer of the film preferably comprises ethylene alpha olefin copolymers and/or lowdensity
polyethylene (LDPE) produced by Ziegler Natta or metallocene catalyst.
opylene, ethylene vinyl acetate, ne methyl acrylate, ethylene butyl acrylate,
ionomer, polyester and polyamide is also possible.
Inner layer
The inner layer of the film would be able to seal the film to itself to secure that no leakers and
oxygen influx is allowed. This could be detrimental to the product packed.
Suitable materials for the inner layer include different polyolefins, preferably ethylene alpha
olefin copolymers, low density polyethylene, polypropylene, ne vinyl acetate, ethylene
methyl acrylate, ionomer, ethylene butyl acrylate and the like.
In general, the above layers may comprise further well known in the art additives such as
antiblock, slip, antifog, r processing enhancers and others.
Polyether copolymers
We have unexpectedly noticed that by adding polyether copolymers having a melting point of
100°C to 120°C in the inner layer, the seal initiation temperature of the film drops to 120°C
while the ability of the film remains very good. The film is nicely transformed inline to a
ed tube without any creasing during the whole rotation of the collapsing frame.
Preferably, the polyether copolymers having a melting point of 100°C to 120°C are added in
the inner layer, in an amount of 5% to 20% by weight.
Preferred polyether copolymers are copolymers with polyolefins, polyamides or polyester. A
typical example of a polyether copolymer useful for the invention is Pelestat LM230 from
Sanyo al.
In a preferred embodiment the melting points of the her copolymers are in the range
100°C to 120°C, preferably 110°C to 120°C. If the melting ature is lower the
gussetability is compromised by the higher friction due to polymer tackiness while if the
melting temperatures are higher the sealing initiation temperature increases.
The preferred melt flow index (MFI) of the polyether copolymer is more than 12 at 190°C and
21.18 N measured according to ASTM D 1238.
SEAL INITIATION TEMPERATURE
This term as used in the present application is defined as the lower sealing temperature
which allows the average sealing th (measured according to ASTM F88) to be at least
mm seal width when the sealing time is 2 seconds, g pressure is 4bars and the
g station is impulse type. Films of the present invention have seal initiation
temperature less than 130°C, preferably less than 125°C, preferable less than 120°C,
preferably less than 115°C.
MELTING POINT OF POLYETHER COPOLYMER
The melting point of the polyether copolymer is measured by DSC (=differential scanning
calorimetry) as well known in the art. The polyether copolymer used in the present invention
has a melting point between 100°C and 120°C.
The preferred method for producing the film of the present ion is how blown film as well
known in the art.
EXMAPLES
EXAMPLE 1
From a commercial hot blown film line we produced the following film
*Outer layer, thickness 30 microns
*Intermediate layer 1, thickness 10 microns
*Tie layer 1, thickness 8 microns
*EVOH 38%, thickness 8 microns
*Tie layer 2, thickness 8 microns
mediate layer 2, thickness 20 s
*Inner layer, thickness 12 microns.
Outer layer was a blend of
89% LDPE+ 10% polyether copolymer+ 1% slip antiblock masterbatch.
LDPE y was 0.923 while MFI was 0.75 under .16 kilos
Intermediate layer 1 was a blend of
60% ethylene hexene copolymer+ 40% LDPE
The y of ethylene hexene copolymer was 0.919 while MFI was 1 under 190°C/2.16
kilos
LDPE was same as used in the outer layer.
Tie layer 1 was maleic anhydride LLDPE based copolymer
Tie layer 2 was similar to tie layer 1
Intermediate layer 2 was exactly the same as intermediate layer 1.
Inner layer was a blend of
89% metallocene LLDPE +10% polyether copolymer+ 1% slip antiblock masterbatch
Metallocene LLDPE had a density of 0.918 while MFI was 1 under 190°C/2.16 kilos
Polyether copolymer used was Pelestat LM230 from Sanyo Chemical.
EXAMPLE 2
In the case of example 2 the LDPE used in the outer layer was replaced by the ethylene
hexene copolymer used in intermediate layer 1.
EXAMPLE 3
In this example, the EVOH 38% was replaced by 32% which is stiffer and thought to be more
difficult to form gusset.
ATIVE E
The ative example was like example 1 but with the polyether copolymer removed and
replaced by MV PEBAX 1074 SA01. This material has a melting point of 158°C as measured
by differential scanning calorimetry (DSC).
EXAMINING SYSTEM
On the tower of the blown film line two gusset boards were mounted as known in the art.
Each example ure ran in production for 2 hours and the number of creases was
monitored. As the s tend to come along in timely intervals, we recorded “creasing
instances”, meaning we recorded any incident when more than 3 creases passed from the
nip section of the blown film line.
The rotation speed was kept constant during all experiments.
RESULTS
es 1 and 2 recorded 2 instances while example 3 recorded 3.
The comparative example ed 2 instances.
Therefore, the invention keeps the good gussetability of the prior art.
SEAL INITIATION.
Test of the seal initiation was done in a Toss sealing machine, keeping the sealing time at 2
s and seal pressure at 4 bars. Sealing was done inner side to inner side.
The measured seal initiation temperature of example 1 was found to be 120°C while for the
comparative example a seal initiation ature of 170°C has been measured.
Claims (12)
1. A plastic film comprising - a blend of a polyolefin homopolymer or copolymer and - a polyether copolymer having a g point in the range of 100°C to 120°C, - an oxygen barrier material.
2. The plastic film of claim 1, where the thickness of the film is between 50 and 300 microns.
3. The plastic film of claim 2, where the thickness of the film is between 60 and 150 microns.
4. The plastic film of one or more of the preceding claims, where the oxygen barrier material is ethylene vinyl l (EVOH).
5. The plastic film of one or more of claims 1-3, where the oxygen barrier material is a polyamide.
6. The c film of one or more of the preceding claims, where the polyolefin is polyethylene or opylene.
7. The c film of one or more of the ing claims, where the polyolefin homopolymer or copolymer is ethylene alpha olefin copolymer.
8. The plastic film of claim 7, where the polyether copolymer is a block copolymer.
9. The plastic film of one or more of the preceding claims, where the polyether copolymer is polyolefin, polyamide or polyester copolymer.
10. The plastic film of one or more of the preceding claims, where the polyether copolymers are contained in at least one of an outer or an inner layer.
11. The plastic films of one or more of the preceding claims, where the polyether copolymers are contained in both inner and outer layers.
12. A ed tubular film made of a plastic film of one or more of the preceding claims.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17210227.9 | 2017-12-22 | ||
EP17210227 | 2017-12-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
NZ749501A NZ749501A (en) | 2022-03-25 |
NZ749501B2 true NZ749501B2 (en) | 2022-06-28 |
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